Keystones — Lintel
Five GCSE retrieval questions · 11 May 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00072
Answer: 7.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 30°. Find opposite
Answer: 6.9cm -
4. Ratio Mixed ratio problems
Divide 104 in the ratio 2:3:3
Answer: 26, 39 and 39 -
5. Statistics Mean
Calculate the mean of: 25, 8, 44, 37, 14, 33
Answer: 26.8